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高考综合型实验题能有效考查考生必备的实验能力、科学探究能力和创新潜质,是近年高考命题的热点题型。笔者结合题例,从化学学科特征和高考选拔人才信度的视角,就高考综合型实验题命制存在的积弊和改革进行探讨。一、让枯燥呆板的试题生动有趣,使命制具有可探究性例题1(2012年高考某市卷第8题):碳酸氢铵是一种重要的铵盐。实验室中,将二氧化碳通入氨水可制得碳酸氢铵,用碳酸氢铵和氯化钠可制得纯碱。完成下列填空:1.二氧化碳通入氨水的过程中,先有晶体(填写化学式)析出,然后晶体溶解,最后析出
College entrance examination comprehensive experimental questions can effectively examine the candidates essential experimental ability, scientific inquiry ability and innovation potential, is the hot topic of college entrance examination proposition in recent years. The author combines the case, from the characteristics of chemistry and college entrance examination selection of personnel reliability perspective, the comprehensive examination of the problems in the entrance examination of the long-standing problems and reforms are discussed. First, to make dull and dull questions vivid and interesting, mission has exploreable example 1 (2012 college entrance examination City Volume 8): Ammonium bicarbonate is an important ammonium salt. In the laboratory, carbon dioxide is introduced into ammonia to produce ammonium bicarbonate, and sodium bicarbonate and sodium chloride are used to produce soda ash. Complete the following fill in the blanks: 1. carbon dioxide into ammonia in the process, the first crystal (fill in the chemical formula) precipitation, and then the crystals dissolved, the final precipitation